Bluetooth version 5.0Support calling (long press the pause button to answer the call when there is a call). Support recording. Recording only supports operation in TF mode or USB mode.Support power-off memoryThe power supply voltage supports between DC 5v-12v, and the working current is between 1-3A. A single USB discharge supports a maximum current of 2A, and the size of the current is determined by the input voltage and data line to determine the final output value.Main functions MP3/USB/TF/LINE IN/FM/BLUETOOTH/remote control/. Support folder selection to play. When USB or TF is playing, there is a folder in the device and there are songs in the folder. Press the previous button or the next button twice to select the folder to play songs, and the screen will display F001-F00? and so on.color: Blackmaterial: plasticPackage Contents:1 x Decoder board3 x power cord1 x antenna1 x remote controlOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.